import com.mysql.jdbc.jdbc2.optional.MysqlDataSource;

import javax.sql.DataSource;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.Scanner;

public class Demo1 {
    public static void main(String[] args) throws SQLException {
        /*Scanner scanner = new Scanner(System.in);
        System.out.println("请输入学号：");
        int id = scanner.nextInt();
        System.out.println("请输入姓名：");
        String name = scanner.next();
        //1.创建DataSource
        DataSource dataSource = new MysqlDataSource();
        ((MysqlDataSource) dataSource).setUrl("jdbc:mysql://127.0.0.1:3306/java109?characterEncoding=utf8&useSSL=false");
        ((MysqlDataSource) dataSource).setUser("root");
        ((MysqlDataSource) dataSource).setPassword("111111");

        //2.建立和数据库服务器之间的连接
        Connection connection = dataSource.getConnection();

        //3.构造sql
        //String sql = new String("insert into student values ( 1,'张三')");
        //String sql = new String("insert into student values (" + id + ",'" + name + "')");
        String sql = new String("insert into student values ( ?,?)");
        PreparedStatement statement = connection.prepareStatement(sql);
        statement.setInt(1, id);
        statement.setString(2, name);
        System.out.println("sql = " + statement);
        //4.把sql发给服务器
        int n = statement.executeUpdate();
        System.out.println("n = " + n);

        //5.释放资源，关闭链接，释放的顺序为，后获取的资源，先释放
        statement.close();
        connection.close();*/
        //1.构造DataSource
        DataSource dataSource = new MysqlDataSource();
        ((MysqlDataSource) dataSource).setUrl("jdbc:mysql://127.0.0.1:3306/java109?characterEncoding=utf8&useSSL=false");
        ((MysqlDataSource) dataSource).setUser("root");
        ((MysqlDataSource) dataSource).setPassword("111111");
        //2.建立连接
        Connection connection = dataSource.getConnection();
        //3.构造sql
        String sql = new String("delete from student where id = 1");
        PreparedStatement statement = connection.prepareStatement(sql);
        //4.执行sql语句
        int n = statement.executeUpdate();
        System.out.println("n = " + n);
        //5.释放资源
        statement.close();
        connection.close();
    }
}
